Before this commit, when we want to make an external url, we need to know if the record is related to a specific website or not, and choose base_url or website domain. Now each model have a fonction get_base_url (public to be callable from email template, ...) and website override this function to add the website domain if the record is website specific. closes odoo/odoo#34089 Signed-off-by: Jérémy Kersten (jke) <jke@openerp.com>